Rare calculators (5)

This old calculators - probably rare, probably not - are unknow on the Web. Any information you have about similar models, shipping date or factory will be appreciated (please use the mail form).

Asaki AE12M. This '73 desktop calculator is the only 'made in Korea' i've in this collection. It sports big 12+1 multiple tube fluorescent display and a good keybord.

Weight/dimensions: 505 gm

Circuits: EA7022, EA7023 (chip date-code: second half 1973)

Power supply: 12V plug (+ centre) for mains adapter

Royal Litton RSC-65. Very nice scientific calculator with 12 digit fluorescent display and good function-shift keyboard. It is made in Germany and built around the A4802 chip (the date code is 1974).

Weight/dimensions: 194 gm (9 x 15.7 x 3.8 cm)

Circuits: A4802, 2 transistor

Power supply: 4x AA, ext plug (-centre)

Tenko ECL-81. This pocketable calculator is built with 8 (multiple tube) fluorescent display with two led for overflow and lo-batt. Built in Japan with medium-low quality parts this calculator is lighter than other multiple-tubes display competitor. The weaker part of this calculator is the low profile keyboard.

Weight/dimensions: 218 gm (8.5 x 14.5 x 3.5 cm)

Circuits: D271D (NEC), uPD261C, 3x MC2547, 7 trans, 19 diodes (chip date-code unknow)

Power supply: 4x AA cell, ext plug 6V (- centre)

Aquitron 12. This old fluorescent 12 digit calculator sports square root, 1/x and ^x calculation as some pre-scientific models plus memory.

Weight/dimensions: 154 gm (8.5 x 14 x 2.5 cm)

Circuits: M58523-23P, 3 trans

Power supply: 4x AA, ext 3,5 mm


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